JP2004107077A - Dispersion supply device and combined measuring device using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a layer thickness of an article in a supply tank uniform by making the best use of a space in the supply tank. <P>SOLUTION: A plurality of supply troughs 3 are aligned and arranged laterally in line at a bottom of an opening on a bottom face side of a tubular tank 2 at an interval of a predetermined height from an opening 33. An inverted-V-shaped sorting member 35A is fixed in parallel to the supply troughs 3. When measured articles W are supplied from a center part of the tank 2 by a supply bucket 34, the measured articles W are sorted to both end sides in the tank 2 by both inclined faces 35b, 35b of the sorting member 35A with a bent part 35a of the sorting member 35A as a boundary. The measured articles W go to both end sides without accumulating only at a center part in the tank 2, so that the layer thickness of the measured articles W in the tank 2 becomes nearly uniform. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a dispersion supply device that uniformly distributes objects to be weighed to a plurality of weighing sections and the like of a combination weighing device and a combination weighing device using the same.
[0002]
[Prior art]
In general, a combination weighing device weighs an object to be weighed supplied from an article supply device by a plurality of weighing units, and selects a combination having a target weight range from a combination of the weighed objects to be weighed, The selected objects to be weighed are collectively discharged.
Prior art document information related to the invention of this application includes the following.
[0003]
[Patent Document 1]
JP-A-10-59522
[Patent Document 2]
JP-A-10-59524
[0004]
FIG. 8 is a schematic configuration diagram of an article supply apparatus disclosed in Patent Document 1 as an example of an article supply apparatus of this type of combination weighing apparatus. In the article supply device shown in FIG. 8, two tanks 101, 101 are provided side by side. Each of the tanks 101 has a rectangular opening at the top, and a plurality of outlets 102 arranged in a line in the longitudinal direction of the tank 101 so as to sandwich a mountain-shaped guide portion 101a at the bottom. Above each outlet 102, a semi-cylindrical lifting block 103 is supported. Each elevating block 103 is driven up and down by a driving device (not shown) to regulate the outflow of the object to be weighed in the tank 101 from the outlet 102 at the lowered position, and to flow out the object to be weighed from the outlet 102 at the raised position. Let it.
[0005]
Above the left tank 101, a first supply conveyor 104 is arranged. The first supply conveyor 104 is constituted by a conveyor capable of switching between normal rotation and reverse rotation. The first supply conveyor 104 can reciprocate horizontally above the tank 101 along the direction in which the outlets 102 of the tank 101 are arranged while being supported by a guide member (not shown). Sensors 105 for optically detecting the height of the object to be weighed below are attached to the lower surface of a frame (not shown) at both ends 104a and 104b of the first supply conveyor 104, respectively. The left end sensor 105 detects the height of the object to be weighed in the left tank 101. The sensor 105 at the right end detects the height of the object to be weighed in the tank 101 on the right side.
[0006]
Above the first supply conveyor 104, a second supply conveyor 106 that is transported and driven in synchronization with the transport of the supply conveyor 104 is fixedly arranged. The second supply conveyor 106 supplies the objects to be weighed received from the supply tank 107 to the first supply conveyor 104. The supply of the objects to be weighed to the supply tank 107 is performed by a bucket conveyor or the like (not shown).
[0007]
Vibration-conveying feeders 108 are arranged below the respective outlets 102 of the tank 101, and the objects to be weighed carried out from the respective feeders 108 are accommodated in a pool hopper 109 arranged below them. An object to be weighed discharged from each pool hopper 109 is supplied to a weighing hopper 110 arranged below the weighing object.
[0008]
The objects to be weighed supplied to the respective weighing hoppers 110 are respectively weighed by weighing devices. The objects to be weighed discharged from each weighing hopper 110 are stored in the timing hopper 111.
[0009]
The pool hopper 109, the weighing hopper 110, and the timing hopper 111 are formed in the shape of a rectangular tube whose upper and lower sides are opened so that the adhesive weighing object does not adhere and remain. It is opened and closed by 110a and 111a.
[0010]
Below the timing hopper 111, two collecting conveyors 112 are arranged on the left and right. The left collecting conveyor 112 conveys the objects discharged from the four left timing hoppers 111 rightward, and the right collecting conveyor 112 transfers the objects discharged from the four right timing hoppers 111 leftward. And are gathered together by a collecting chute 113 arranged between both collecting conveyors 112, 112.
[0011]
By the way, in the above article supply device, the amount of the objects to be weighed in both tanks 101, 101 decreases as the combination discharging operation is repeated. However, the objects weighed by the weighing hoppers 110 differ in the frequency of being selected as a combination. Therefore, the amount of the object to be weighed discharged from each discharge port 102 of the tank 101 per unit time is not always uniform.
[0012]
In order to solve the above problem, the article supply apparatus detects a position where the height of the object to be weighed is equal to or less than a predetermined value by a signal of the sensor 105 and moves the first supply conveyer 104. I am supplying things. More specifically, as shown in FIG. 9A, for example, as shown in FIG. 9A, when the height of the object to be weighed in the vicinity of the upper right outlet 102 of the left tank 101 becomes equal to or less than a predetermined value, the height of the object is reduced to the first supply conveyor. The sensor 105 on the left side of 104 detects the signal. When receiving the signal from the sensor 105, it is confirmed that the rightmost end of the left tank 101 and the second lifting block 103 from the right are not operating, and the first supply conveyor 104 is moved as shown in FIG. At this position, the first and second supply conveyors 104 and 106 are transported and driven to intensively drop and supply the objects to be weighed to the right inside the left tank 101. When the height of the object to be weighed below the left sensor 105 becomes higher than a predetermined height, the conveyance of the second supply conveyor 106 is stopped, and all the objects to be weighed on the first supply conveyor 104 are stored in the tank 101. Then, the transport of the first supply conveyor 104 is stopped, and the sliding movement of the first supply conveyor 104 is restarted.
[0013]
[Problems to be solved by the invention]
In the conventional article supply apparatus described above, a supply tank 107 and two types of supply conveyors 104 and 106 are provided between the two tanks 101 and a transport device such as a bucket conveyor in order to eliminate bias of the objects to be weighed in the tank 101. Indispensable. For this reason, since a replenishing device including a large-scale mechanical component is disposed above the tank 101, there is a problem that the entire device becomes large. Further, the two types of supply conveyors 104 and 106 must be controlled while synchronizing with each other. After the stop position of the first supply conveyor 104 is determined, both supply conveyors 104 and 106 are operated. In addition, the object to be weighed is not directly carried into the tank 101 from a transport device such as a bucket conveyor, but is carried through the supply tank 107 and the two types of supply conveyors 104 and 106. For this reason, there is a problem that it takes time to complete each measurement, and the combination discharge operation cannot be performed smoothly.
[0014]
Further, as a solution for eliminating the bias of the objects to be weighed in the tank 101 described above, an article supply device disclosed in Patent Document 2 is known. In this article supply device, as shown in FIGS. 10A and 10B, the height of articles in the tank 101 is set to a tank 101 having a plurality of outlets 102 provided in a bottom in a predetermined direction. A plurality of sensors 120 are provided along the direction in which the outlets 102 of the tank 101 are arranged. Then, the supply conveyor 121 is arranged with the discharge port 102 facing upward from the upper side and the conveying direction is oriented in the direction in which the discharge ports 102 are arranged, and the output of the sensor 120 makes the height of the object to be weighed in the tank 101 uniform. Thus, the transport speed of the supply conveyor 121 is controlled.
[0015]
However, in the article supply apparatus, when controlling the transport speed of the supply conveyor 121, the drop position of the object to be refilled into the tank 101 differs depending on the weight of the object on the supply conveyor 121. For this reason, the transport speed of the supply conveyor 121 has to be controlled according to the weight of the object to be weighed so that the object to be weighed falls to the target drop position.
[0016]
By the way, all of the above-mentioned conventional article supply apparatuses have a configuration provided with a reinforcing tank and a conveyor, but in recent years, downsizing of the entire apparatus has been desired for the purpose of saving space and simplifying the configuration. For this reason, in the combination weighing device described above, a configuration in which the objects to be weighed are directly carried into two tanks from a transfer device such as a bucket conveyor is desired.
[0017]
However, in the above-described combination weighing device, when the object to be weighed is directly carried into the tank, the object to be weighed in the tank cannot be made uniform. That is, when the objects to be weighed are directly carried into the central portion of the tank from a transport device such as a bucket conveyor so that the objects to be weighed are not spilled out of the tanks into the two tanks of the combination weighing device described above, Only the objects to be weighed are concentrated and piled up, increasing the layer thickness. Then, the layer thickness of the object to be weighed decreases toward both ends in the tank. At this time, even if the object to be weighed is a dry product such as a snack or a candy, and the piled-up portion collapses and spreads to the periphery, it does not reach both ends in the tank. For this reason, the layer thickness of the objects to be weighed in the entire tank is not uniform, the supply of the objects to be weighed from both ends of the tank to the supply trough is reduced, and efficient combination weighing cannot be realized. Cause problems.
[0018]
Therefore, even when the object to be weighed is directly carried into the center of the tank from the transfer device, the difference in the layer thickness of the object to be weighed between the center and both ends of the tank is reduced, and the layer thickness of the object to be weighed in the entire tank is reduced. There has been a demand for a configuration capable of making the temperature substantially uniform.
[0019]
In view of the above, the present invention has been made in view of the above problems, and when the object to be weighed is directly supplied to the center portion of the tank from a transport device such as a bucket conveyor, the layer thickness of the object to be weighed over the entire tank. And a combination weighing device using the same.
[0020]
[Means for Solving the Problems]
In order to achieve the above object, the dispersion supply device according to the first aspect of the present invention has a cylindrical shape having openings 32 and 33 on the upper surface and the bottom surface, respectively. A plurality of supply troughs 3 that are supplied and arranged below the opening 33 in the bottom surface in a horizontal line, and supply the object to be weighed to each of the plurality of supply troughs;
A distributing member that is fixed or rotatable at a position above the center of the tank and that distributes and distributes the objects to be weighed in the arrangement direction of the plurality of supply troughs.
[0021]
According to a second aspect of the present invention, in the dispersion supply device according to the first aspect, the distribution member is fixedly provided at a position above a central portion of the tank, and the distribution member is provided with a bent portion a as a boundary. An inverted V-shaped distribution member 35A that distributes and distributes the plurality of supply troughs in the arrangement direction is provided.
[0022]
According to a third aspect of the present invention, in the dispersion supply device according to the first aspect, the distribution member 35 is rotatably provided at a position above a central portion of the tank so as to form an inclined surface 35b, And a plate-like distribution member 35B for distributing and distributing the object to be weighed by the inclined surface to a position where the layer thickness of the object is small.
[0023]
According to a fourth aspect of the present invention, in the dispersion supply device of the third aspect, a detecting unit 36 for detecting a layer thickness of the object W to be weighed at least at two positions on both ends in the tank 2;
When it is determined that the detection value of the detection means is smaller than a preset reference value, the rotation of the distribution member 35B is performed so that the object to be weighed is supplied to a position in the tank that indicates the detection value. And control means 37 for controlling the
[0024]
According to the invention of claim 5, the object to be weighed W is weighed by a plurality of weighing units, and a combination having a target weight range is selected from the combination of the weighed objects to be weighed. In the combination weighing device 1 that collectively discharges,
It has a cylindrical shape having openings 32 and 33 on the upper surface and the bottom surface, respectively. The object to be weighed is supplied from the center of the opening 32 on the upper surface, and a plurality of supply troughs 3 are provided below the opening 33 on the bottom surface. A tank 2 arranged in a line and supplying the object to be measured to each of the plurality of supply troughs;
A distributing / supplying device 31 having a distribution member 35 fixedly or rotatably provided at a position above the center of the tank and distributing and distributing the objects to be weighed in the arrangement direction of the plurality of supply troughs. It is characterized by the following.
[0025]
According to a sixth aspect of the present invention, in the combination weighing device of the fifth aspect, the distribution member 35 is rotatably provided at a position above a central portion of the tank so as to form an inclined surface 35b, A flat distribution member 35B that distributes and distributes the object to be weighed by the inclined surface to a position where the layer thickness of the object W is small,
A plurality of weighing hoppers 5 arranged corresponding to the plurality of supply troughs 3,
A plurality of weighing devices 25 provided for each of the plurality of weighing hoppers 5 and configured to weigh an object to be weighed;
When a weighing value from a weighing device that weighs an object to be weighed contained in weighing hoppers corresponding to at least two locations on both ends of the tank is input and it is determined that the weighing value is smaller than a preset reference value. Further, a control means 38 for controlling the rotation of the distribution member 35B is provided so that the object W to be weighed is supplied to a position in the tank indicating the weighed value.
[0026]
In the dispersion supply device of the present invention and the combination weighing device using the same, when the object to be weighed is supplied from the center of the tank, the object to be weighed is dispersed and distributed by the distribution member and supplied to the position where the layer thickness is small. Is done. Thereby, the layer thickness of the object to be weighed in the tank becomes substantially uniform without being piled up only at the center of the tank.
[0027]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a side view showing the overall configuration of a combination weighing device employing a dispersion supply device according to the present invention, FIG. 2 is a plan view of the combination weighing device, FIG. 3 is a front view of the combination weighing device, and FIG. FIG. 5 is a schematic configuration diagram showing a first embodiment of the dispersion supply device according to the present invention, FIG. 5 is a schematic configuration diagram showing a second embodiment of the dispersion supply device according to the present invention, and FIG. FIG. 7 is a schematic diagram showing a fourth embodiment of the dispersion supply device according to the present invention.
[0028]
The dispersion supply device of the present invention is used, for example, when uniformly distributing an object to be measured to a plurality of weighing units or the like of a combination weighing device and supplying the same, and distributes the object to be weighed in an arrangement direction of a plurality of supply troughs. The basic configuration is a configuration including members.
[0029]
First, the overall configuration of a combination weighing device employing the dispersion supply device of the present embodiment will be described with reference to FIGS.
[0030]
As shown in FIGS. 1 to 3, the combination weighing device 1 includes a tank 2, a supply trough 3 disposed below the tank 2, a stock hopper 4 disposed below the supply trough 3, and a stock hopper 4. , A memory hopper 6 disposed below the weighing hopper 5, and a collecting chute 7 disposed below the memory hopper 6 as main components. . Among them, the supply trough 3, the stock hopper 4, the weighing hopper 5, and the memory hopper 6 constitute a so-called channel 8 arranged in the vertical direction.
[0031]
The tank 2 serving as the base of the dispersion supply device 31 described later has a rectangular cylindrical shape that communicates the substantially rectangular openings 32 and 33 in the vertical direction. The lower opening 33 of the tank 2 is located on a rear end 3a of each supply trough 3 described later. An object to be weighed is put into the tank 2 through the upper opening 32, and stores the object to be weighed.
[0032]
The supply trough 3 sends an object to be weighed (not shown) downstream (left and right sides in FIG. 1) by vibrating, and the rear end 3a on the upstream side is arranged back to back. As shown in FIG. 2, the supply trough 3 has a plurality of pairs (five pairs in the illustrated example) with the downstream end 3b facing outward, and is arranged in parallel in the vertical direction in the figure. ing. That is, five supply troughs are arranged in a straight line, and a total of ten supply troughs are arranged back to back. The number of the supply troughs 3 arranged in parallel is not limited to this.
[0033]
The supply trough 3 has a rear end 3 a inserted into the tank 2 from the bottom of the tank 2. Therefore, when the supply trough 3 vibrates, the objects to be weighed in the tank are directly conveyed from the tank to the stock hopper 4 by the supply trough 3. This eliminates the need for a dispersing device conventionally required for transporting an object to be weighed from the tank 2 to the supply trough 3, thereby making it possible to reduce the size and cost of the device.
[0034]
The supply trough 3 forms an overlap portion 17 in which one of the rear end portions 3a which are inserted into the tank 2 and are back to back is overlapped with the other. A gap is formed in a pair of adjacent supply troughs 3 so that the vibrating supply troughs 3 do not interfere with each other. The trough 3 is closed by forming an overlapped portion 18 on the side thereof. Since each supply trough 3 vibrates, it is necessary to arrange the supply trough 3 with a predetermined gap. The object to be weighed may fall from this gap, but in this combination weighing device 1, the gap is covered by the overlap portions 17 and 18, so that the object to be weighed can be weighed from the gap between the supply troughs inserted into the tank 2. Things will not fall.
[0035]
The supply trough 3 has the rear end 3a side inclined upward in the tank 2. Therefore, the rear end 3a of the supply trough 3 is inclined upward, so that the rear end 3a of the supply trough 3 vibrating in the tank 2 extends obliquely upward. A so-called bridge in which the object to be weighed is bridged between the opposed inner wall surfaces 2a, 2a is less likely to occur.
[0036]
Further, a projection 19 projecting into the tank 2 is provided upright on the overlap portion 17 at the rear end 3a of the supply trough 3. By providing the projections 19 on the supply trough 3, the above-mentioned bridge of the object to be weighed in the tank 2 is more unlikely to occur.
[0037]
The stock hoppers 4 are disposed below the front end portions 3b of the respective supply troughs 3 in a back-to-back relationship. The stock hopper 4 has an opening 4a in the upper part and a discharge port 4b in the lower part, so that the object to be weighed supplied from the supply trough 3 can be discharged from the discharge port 4b. The outlet 4b is opened and closed by a shutter 4c. The shutter 4c is driven to open and close by a drive unit (not shown).
[0038]
The weighing hoppers 5 are disposed below the outlets 4b of the respective stock hoppers 4 in a back-to-back relationship. The weighing hopper 5 has an opening 5a in the upper part and a discharge port 5b in the lower part, so that the object to be weighed supplied from the stock hopper 4 can be discharged from the discharge port 5b. The discharge port 5b is opened and closed by a shutter 5c. The shutter 5c is driven to open and close by a drive unit (not shown). The objects to be weighed supplied to the respective weighing hoppers 5 are respectively weighed by measuring devices 25 provided for the respective weighing hoppers 5.
[0039]
The memory hoppers 6 are disposed below the discharge ports 5b of the respective weighing hoppers 5 in a back-to-back relationship. The memory hopper 6 has an opening 6a at the top and a discharge port 6b at the bottom, so that the objects to be weighed supplied from the weighing hopper 5 can be discharged from the discharge port 6b. The outlet 6b is opened and closed by a shutter 6c. The shutter 6c is driven to open and close by a drive unit (not shown). The objects to be weighed discharged from the memory hopper 6 are collected by the collecting chute 7.
[0040]
In the combination weighing device 1 described above, the objects to be weighed contained in the tank are supplied to each stock hopper 4 by each supply trough 3. Each stock hopper 4 stores a predetermined amount of the object to be weighed, and discharges the object to be weighed to the lower weighing hopper 5 by opening the shutter 4c. Each supply trough 3 supplies a new object to be weighed to the stock hopper 4 when there is no more object to be weighed in the stock hopper 4 therebelow. Each of the weighing hoppers 5 stores the objects to be weighed from each of the stock hoppers 4, and weighs the objects to be weighed by the weighing devices 25, respectively. Next, after weighing, each stock hopper 4 discharges the object to be measured to the lower memory hopper 6 by opening the shutter 5c.
[0041]
The weighing signal of each weighing device 25 is input to a combination selecting means (not shown). The combination selecting means stores the weight of the object to be weighed supplied to each weighing hopper 5 based on the weighing signal of each weighing device 25. For example, when receiving a discharge request signal from a packaging line or the like, a combination within the target weight range is selected from the combinations of the weight values of the objects weighed by the respective weighing hoppers 5, and the selected weighing target is selected. A selection signal corresponding to the weighing hopper 5 and / or the memory hopper 6 containing the object is output to open the shutter 5c and / or the shutter 6c. Thereby, the objects to be weighed combined in a weight within the target weight range are collected by the collecting chute 7 and discharged to the packaging line.
[0042]
There are a plurality of methods for selecting an object to be weighed by the combination selecting means. In this method, a combination is selected from the objects to be weighed stored in the weighing hopper 5, and only the selected objects to be weighed are once stored in the memory hopper 6 and then discharged to the collecting chute 7. Also, a method of storing the objects to be weighed by the weighing hopper 5 in the memory hopper 6 and selecting a combination from the objects to be weighed stored in the memory hopper 6. Then, there is a method of selecting a combination from the object to be weighed in the weighing hopper 5 and the object to be weighed in the memory hopper 6. In the present combination weighing device 1, any of these methods may be employed.
[0043]
Next, each embodiment of the dispersion supply apparatus according to the present invention will be described with reference to the drawings. In addition, the distributed supply apparatus 31 (31A to 31D) of each embodiment described below is used when supplying a dry product such as a snack or candy to a plurality of supply troughs 3 as an object W to be weighed. It is.
[0044]
First, a distributed supply device 31A according to the first embodiment will be described with reference to FIG. The dispersion supply device 31A according to the first embodiment has a tank 2 to which an article W as an object to be weighed is supplied. The tank 2 is formed in a rectangular tube shape having rectangular openings 32 and 33 on the upper surface and the bottom surface, respectively. In the lower part of the tank 2, a plurality of supply troughs 3 are arranged in a line in a horizontal line with a gap of a predetermined height from the opening 33 on the bottom surface. One end of each of the supply troughs 3 faces the opening 33 on the bottom surface of the tank 2. In the example of FIG. 4, an example in which five supply troughs 3 are arranged in the lower part of the tank 2 is shown. Also on the side, five supply troughs 3 are arranged facing each other. An article W as an object to be weighed is supplied to the tank 2 by a predetermined amount from a central portion by a transfer device 34 such as a supply bucket or a bucket conveyor.
[0045]
At a position above the center of the tank 2, a sorting member 35 (35A) for sorting the articles W supplied from the center of the tank 2 is provided in parallel with the supply trough 3. The distribution member 35A is formed of a long plate material bent in an inverted V-shape. The distributing member 35A is fixed to inner wall surfaces 2a, 2a whose longitudinal ends are opposed to each other in the front-rear direction (the depth direction of the tank 2) on the paper surface of FIG. The inclination angle θ of the distribution member 35A is preferably such that when the article W is supplied from the center of the tank 2, the distribution W is distributed to a position extending to both ends of the tank 2.
[0046]
In the dispersion supply device 31A having the above configuration, when the articles W are supplied to the center of the tank 2 from the transport device 34 such as a supply bucket, the articles W are folded by the sorting member 35A as shown by the arrow A in FIG. It is distributed and distributed toward both ends in the tank 2 (on the left and right sides in FIG. 4, the arrangement direction of the supply troughs 3) by the two inclined surfaces 35 b with the curved portion 35 a as a boundary. Thereby, the articles W are distributed and distributed on both sides without being concentrated and piled up only in the central portion in the tank 2, and the layer thickness of the articles W in the tank 2 can be made substantially uniform. At this time, if the product W is a dry product, the product W is distributed to both sides in the tank 2 with the distribution member 35A as a boundary without adhering to the distribution member 35A. In addition, even if the articles W distributed to both sides in the tank 2 by the distribution member 35A are piled up, the articles W are naturally collapsed and are appropriately dispersed to both ends and the center in the tank 2.
[0047]
Next, a dispersion supply device 35B according to a second embodiment will be described with reference to FIG. The same components as those in the first embodiment are denoted by the same reference numerals, and only different configurations will be described.
[0048]
In the dispersion supply device 35B according to the second embodiment, the distribution member 35B provided above the center of the tank 2 is formed in a flat plate shape as shown in FIG. The center of both ends of the distribution member 35B is rotatably supported on the inner wall surfaces 2a, 2a of the tank 2 facing each other, and the longitudinal direction of the supply trough 3 (a direction orthogonal to the arrangement direction of the supply troughs 3). ).
[0049]
In the dispersion supply device 35B having the above-described configuration, when the articles W are supplied from the transport device 34 such as a supply bucket to the center of the tank 2, the articles W are supplied to the tank 2 at positions where the layer thickness of the articles W is small. Then, the distribution member 35B is rotated. Thereby, as shown by the arrow B in FIG. 5, the article W is supplied to the portion of the tank 2 where the layer thickness of the article W is small by the inclined surface 35b of the distribution member 35B, and the layer thickness of the article W in the tank 2 is reduced. Is made uniform.
[0050]
Next, a distributed supply device 31C according to a third embodiment will be described with reference to FIG. Note that the same components as those in the first and second embodiments are denoted by the same reference numerals, and description thereof is omitted. Further, the distributed supply devices 31C and 31D according to the third and fourth embodiments described below are examples in which the tilt angle is changed by controlling the rotation of the rotating distribution member 35B.
[0051]
As shown in FIG. 6, the dispersion supply device 31C according to the third embodiment includes, in addition to the configuration of the second embodiment, a detection unit 36 that detects a layer thickness of an article W and a distribution member 35B by a predetermined angle. The control unit 37 includes a driving unit 40 that moves, and a control unit 37 that outputs a command to the driving unit 40 to rotate the distribution member 35B by a predetermined angle based on the detection result of the detection unit 36.
[0052]
More specifically, the detection unit 36 is configured by, for example, a reflection type light emitting / receiving sensor. The reflection type detecting means 36 is provided at two upper positions on both ends of the tank 2 so that the detection surface faces the bottom surface of the tank 2, and optically measures the layer thickness of the article W at two positions on both ends in the tank 2. Has been detected. That is, the detecting means 36 irradiates light toward the bottom surface at both ends in the tank 2, receives reflected light accompanying the light irradiation, and uses an electric signal proportional to the received light amount as a detection signal as a control means 37. Output to
[0053]
In addition, as the detecting means 36, a transmission type light emitting / receiving sensor can be used. In this case, a light-emitting sensor and a light-receiving sensor are provided to face two side surfaces on both ends of the tank 2 (the front surface and the rear surface in FIG. 6, the surfaces on which the distribution member 35B is attached). Then, the transmission type detecting means 36 irradiates light toward the inside of the tank 2 and outputs an electric signal proportional to the amount of received light accompanying the light irradiation to the control means 37 as a detection signal.
[0054]
The control unit 37 receives the detection signal from the detection unit 36 as an input, and when determining that the value of the detection signal is smaller than a preset reference value, the direction in the tank 2 indicating the detection value by the detection unit 36 ( A command is output to the driving means 40 to rotate the distribution member 35B by a predetermined angle so that the article W is supplied in one direction (both ends). Then, upon receiving a command from the control unit 37, the driving unit 40 rotates the distribution member 35B by a predetermined angle. If both of the two detected values by the detecting means 36 are smaller than the reference value, the one with the larger difference from the reference value is adopted.
[0055]
In the dispersion supply device 31C having the above-described configuration, the detection unit 36 detects the layer thickness of the article W at both ends in the tank 2 and indicates the detected value when the detected value is determined to be smaller than the reference value. The rotation of the distribution member 35B is controlled so that the article W is supplied to the position. Thereby, the layer thickness of the article W in the tank 2 can be made substantially uniform.
[0056]
In the distributed supply device 31C according to the third embodiment, when the article W is supplied from the central part of the tank 2, the detecting means 36 are provided at two places on both ends of the tank 2 where the layer thickness of the article W tends to decrease. Although the configuration provided has been described, for example, the detection means 36 may be provided at a plurality of locations in units of the supply trough 3. In this case, among the detection signals from the respective detection means 36, the detection signal indicating the smallest value is compared with the reference value, and if it is determined that the detection signal is smaller than the reference value, the detection signal corresponding to the supply trough 3 indicating the detection value is determined. The rotation angle of the distribution member 35B is controlled so that the article W is supplied to the position in the tank 2 to be supplied. Thereby, the layer thickness of the article W in the tank 2 corresponding to each supply trough 3 can be detected, and the article W can be supplied to a position where the layer thickness is the smallest.
[0057]
Next, a distributed supply device 31D according to a fourth embodiment will be described with reference to FIG. Note that the same components as those in the first and second embodiments are denoted by the same reference numerals, and description thereof is omitted.
[0058]
As shown in FIG. 7, in addition to the configuration of the second embodiment, the dispersion supply device 31D of the fourth embodiment weighs the driving means 41 that rotates by a predetermined angle and the object W in the weighing hopper 5. The control means 38 outputs a command to the driving means 41 to rotate the distribution member 35B by a predetermined angle based on the measured value of the measuring device 25.
[0059]
More specifically, the control unit 38 receives the weighing values from all the weighing devices 25 provided for each of the weighing hoppers 5 and inputs each weighing value to a predetermined reference value (the weighing hopper 5 weighs the minimum necessary amount). Value). When it is determined that there is a weighing value indicating a value smaller than the reference value, the drive is performed to control the rotation angle of the distribution member 35B so that the article W is supplied to the position in the tank 2 indicating the weighing value. An instruction is output to the means 41. Then, upon receiving a command from the control unit 38, the driving unit 41 rotates the distribution member 35B by a predetermined angle. At this time, when there are a plurality of weighing values indicating values smaller than the reference value, the weighing value indicating the value having the largest difference from the reference value is adopted.
[0060]
In the dispersion feeding device 31D having the above-described configuration, the layer thickness of the article W in the tank 2 is artificially detected based on the measured value of the measuring device 25 that measures the object W in the measuring hopper 5, and the measured value is higher than the reference value. When a small value is indicated, the rotation of the distribution member 35B is controlled such that the article W is replenished to a position in the tank 2 indicating the small value. Thereby, the layer thickness of the article W in the tank 2 can be made substantially uniform.
[0061]
In the above-described fourth embodiment, the description has been made assuming that the weighing values from all the weighing devices 25 provided for each weighing hopper 5 are input to the control means 38. However, the layer thickness of the article W may decrease. The measured values from the measuring device 25 of the measuring hopper 5 corresponding to at least two places on both ends of the tank 2 may be input to the control means 38. Further, a configuration in which the third embodiment and the fourth embodiment described above are used in combination may be adopted. In this case, when the detection value of the detection means 36 is smaller than the reference value and the weighing value is smaller than the reference value, the distribution member 35B is rotated so that the article W is supplied to the position in the tank 2 indicating the value. Dynamic control. Thereby, the layer thickness of the article W in the tank 2 can be more strictly uniform.
[0062]
As described above, according to the dispersion supply device 31 (31A to 31D) of the present example, replenishment including large conventional mechanical components between the tank 2 and the transport device 34 such as a supply bucket or a bucket conveyor. Without disposing the device, simple components such as a fixed distributing member 35A or a rotating distributing member 35B made of a plate material are provided at a position above a central portion in the tank 2 to provide a simple arrangement. The space can be effectively used, the difference in the layer thickness of the article W between the center and both ends in the tank 2 can be reduced, and the layer thickness of the article W in the tank 2 can be made uniform.
[0063]
If the articles W sorted by the sorting member 35 are dry products, the articles W are dispersed and sorted in the tank 2 without adhering to the sorting member 35. Moreover, even if the sorted articles W are piled up to some extent, they naturally collapse and spread to the surroundings, and the difference between the refilled position and the layer thickness of the surrounding articles is reduced.
[0064]
When the rotating distribution member 35B is employed, the rotation angle of the distribution member 35B is controlled based on the detected value of the layer thickness of the article W at both ends in the tank 2, or the weighing hopper 5B is used. The rotation angle of the distribution member 35B is controlled based on the measurement value of the weighing device 25 provided for each, and further, the rotation angle of the distribution member 35B is controlled by using these components together. Thereby, the replenishment of the article W can be performed more strictly at the position where the layer thickness of the article W is small, and the layer thickness of the article W in the tank 2 can be made uniform.
[0065]
In addition, a rotation-type distributing member 35B is employed, and the detection signal from the detecting means 36 provided in the unit of the supply trough 3 and / or the weighing value from all the measuring devices 25 provided for each weighing hopper 5 are used. If the rotation angle of the distribution member 35B is controlled based on this, it is possible to replenish the articles W not only at both ends in the tank 2 but also at a position where the thickness of the articles W is small, thereby making the entire layer thickness uniform. Can be.
[0066]
【The invention's effect】
As is apparent from the above description, according to the present invention, a fixed distributing member or a rotary distributing member made of a plate material can be used without disposing a replenishing device including large-scale mechanical components as in the related art. By disposing the distributing member at a position above the central portion in the tank, the space in the tank can be effectively used, and the layer thickness of the articles in the tank can be made uniform.
[0067]
In addition, by adopting a rotation type distribution member, if the rotation angle of the distribution member is controlled based on a detection signal from the detection means or a measurement value from a measuring device provided for each measurement hopper, the inside of the tank can be controlled. Not only at both ends but also at positions where the layer thickness of the object to be measured is small, the object to be weighed can be replenished to make the entire layer thickness uniform.
[Brief description of the drawings]
FIG. 1 is a side view showing the overall configuration of a combination weighing device employing a dispersion supply device according to the present invention.
FIG. 2 is a plan view of the combination weighing device of FIG. 1;
FIG. 3 is a front view of the combination weighing device of FIG. 1;
FIG. 4 is a schematic configuration diagram showing a first embodiment of a dispersion supply device according to the present invention.
FIG. 5 is a schematic configuration diagram showing a second embodiment of the dispersion supply device according to the present invention.
FIG. 6 is a schematic configuration diagram showing a third embodiment of the dispersion supply device according to the present invention.
FIG. 7 is a schematic configuration diagram showing a fourth embodiment of the dispersion supply device according to the present invention.
FIG. 8 is a front view of an article supply device employed in a conventional combination weighing device.
9A and 9B are operation diagrams of the article supply device of FIG.
10A and 10B are operation diagrams of another configuration of the article supply device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Combination metering device, 2 ... Tank, 3 ... Supply trough, 5 ... Measuring hopper, 25 ... Measuring device, 31 (31A-31D) ... Dispersion feeding device, 32 ... Top opening, 33 ... Bottom opening, 35 ( 35A, 35B) Distributing member, 35a Bending portion, 35b Inclined surface, 36 Detection means, 37, 38 Control means.

Claims (6)

It has a cylindrical shape having openings (32, 33) on the upper surface and the bottom surface, respectively. An object to be weighed (W) is supplied from the center of the opening (32) on the upper surface, and below the opening (33) on the bottom surface. A plurality of supply troughs (3) arranged in a horizontal row, and a tank (2) for supplying the object to be weighed to each of the plurality of supply troughs;
A distributing member (35) fixedly or rotatably provided at a position above a central portion of the tank and distributing and distributing the objects to be weighed in the arrangement direction of the plurality of supply troughs. Dispersion supply equipment. The distribution member (35) is fixedly provided at a position above a central portion of the tank, and disperses the object to be measured in a direction in which the plurality of supply troughs are arranged at a bent portion (35a). 2. The dispersion supply device according to claim 1, wherein the distribution member is an inverted V-shaped distribution member (35A) for distribution. 3. The distribution member (35) is rotatably provided at a position above a central portion of the tank so as to form an inclined surface (35b), and is inclined with respect to a position where the layer thickness of the object is small. The dispersion supply device according to claim 1, wherein the dispersion supply device is a plate-shaped distribution member (35B) that disperses and distributes the object to be measured by a surface. Detecting means (36) for detecting the layer thickness of the object to be weighed (W) at least at two places on both ends in the tank (2);
When it is determined that the detection value of the detection means is smaller than a preset reference value, the distribution member (35B) is replenished so that the object to be weighed is supplied to a position in the tank that indicates the detection value. The dispersion supply device according to claim 3, further comprising control means (37) for controlling rotation. Combination weighing in which a weighing object (W) is weighed by a plurality of weighing units, a combination having a target weight range is selected from a combination of the weighed objects, and the selected weighing objects are collectively discharged. In the device (1),
It has a cylindrical shape having openings (32, 33) on the upper surface and the bottom surface, respectively. The object to be weighed is supplied from the center of the opening (32) on the upper surface, and a plurality of objects are provided below the opening (33) on the bottom surface. A supply trough (3) is arranged in a horizontal row, and supplies the object to be weighed to each of the plurality of supply troughs;
A distribution member (35) fixedly or rotatably provided at a position above the center of the tank and having a distribution member (35) for distributing and distributing the objects to be weighed in the arrangement direction of the plurality of supply troughs; A combination weighing device comprising: The distribution member (35) is rotatably provided at a position above the center of the tank so as to form an inclined surface (35b), and is disposed at a position where the layer thickness of the object (W) is small. And a plate-shaped distribution member (35B) for distributing and distributing the object to be weighed by the inclined surface.
A plurality of weighing hoppers (5) arranged corresponding to the plurality of supply troughs (3);
A plurality of weighing devices (25) provided for each of the plurality of weighing hoppers (5) and configured to weigh an object to be weighed;
When a weighing value from a weighing device that weighs an object to be weighed contained in weighing hoppers corresponding to at least two locations on both ends of the tank is input and it is determined that the weighing value is smaller than a preset reference value. The control means (38) for controlling rotation of the distribution member (35B) such that the object (W) to be weighed is supplied to a position in the tank indicating the weighed value. Combination weighing device.

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